| crabs | Chiefly marine, largely carnivorous crustaceans including the genera cancer, uca, and callinectes. It includes crabs as food. (12 Dec 1998) |
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| horseshoe crabs | An arthropod subclass (xiphosura) comprising the north american (limulus) and asiatic (tachypleus) genera of horseshoe crabs. (12 Dec 1998) |
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